Scientific American Magazine
Volume 65, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
American Institute Fair
An Improved Ventilator or Blower
An Improved Stalk Cutting Machine
A Simple Mechanical Motor
An Annunciator for Burglar Alarms, Etc.
A Boiler Feeder, Regulator, and Alarm
The German Army Swimming Exercises
An Improved Pipe Joint
A Simple and Convenient Music Holder
An Improved Flat Iron and Heater
A Mousetrap
Bad Paving in New York
A Proposed "Whaleback" Passenger Steamer
Electrical Rock Drills
A Twin Screw Launch Run by a Compound Engine
Electric Mining Locomotives
The "Otto" Gasoline Engine
Departments
Correspondence- November 14, 1891
Recently Patented Inventions- November 14, 1891
Business and Personal- November 14, 1891
Notes & Queries- November 14, 1891
Index of Inventions- November 14, 1891
To Inventors- November 14, 1891
